What are the types and numbers of scouts my son can expect to see at this showcase?

The PG staff is great, but don't get your hopes up on coaches and scouts at the underclass showcase. When my son went, the only college coaches there were from the host school. Did not spot a single other coach from a four year school. Also, my son got put on a team that was part of an existing "core" team whose members got a lot more playing time. My son's playing time was a much more limited than I would have liked given it was a pay-to-play showcase. As for PG overall, we will be back for sure - good folks who know what they are doing, but I would not suggest spending the time and money on the underclass for any reason other than getting the experience under your belt.